Overview
The Komatsu HD785-7 Rock Truck is a articulated dump truck listed in the Heavy Equipment Hub equipment database with structured specifications for comparison, research, and machine selection. Key specification points include travel speed of 40.4 mph and fuel capacity of 1,308.0 gal. This model can be reviewed for equipment comparison, jobsite planning, fleet research, and specification-based machine selection. Use the full specifications table to compare the Komatsu HD785-7 Rock Truck against similar articulated dump truck models by power, weight, capacity, dimensions, speed, and other technical values.
Key Specifications
Overall Length
36.14
ft
Full Specifications
42 specs
Dimensions
Capacity Struck
40
Dumping Angle
48 deg
Heaped (2:1, Sae)
60
Height At Full Dump
33.10 ft / 10.09 m
Material
400
Material Thickness-Bottom
0.80
Material Thickness-Front
0.50
Material Thickness-Sides
0.40
Overall Height
16.57 ft / 5.05 m
Overall Length
36.14 ft / 11.02 m
Wheelbase
16.25 ft / 4.95 m
Width Over Tires
17.07 ft / 5.20 m
Engine
140 mm x 165 mm
1,995
Differential
3.36
Displacement
1,860 cu in / 30.5 L
Empty Weight
158,733 lb / 72,000 kg
Engine Make
2238
Engine Model
SAA12V140E-3
Engine Type
Water-cooled, 4-cycle
Final Drive
128
Fuel Tank
1,308 gal / 4,951.3 L
Horse Power: Iso 9249 / Sae J1349
1,178
Horse Power: Sae J1995
1,200
Max Speed
40.40 mph / 65.0 km/h
Number of Cylinders
12
Power Measured @
1,900 rpm
Turning Radius
33.14 ft / 10.10 m
Weight Distribution Front - Empty
47 lb / 21 kg
Weight Distribution Front - Loaded
31 lb / 14 kg
Weight Distribution Rear - Empty
53 lb / 24 kg
Weight Distribution Rear - Loaded
69 lb / 31 kg
Hydraulics
Brake Surface
37,467
Break Control
36
Differentials
137
Engine Oil
129 gal / 488.3 L
Gross Weight
361,073 lb / 163,780 kg
Hoist Cylinder
2
Hoist Time
-13
Planetary
6.33
Speed Range
7
Suspension
93
Torque Converter, Transmission And Retarder Cooling
205 lb-ft / 278 Nm
Related Machines
Frequently Asked Questions
How does the Komatsu HD785-7 Rock Truck compare to similar Articulated Dump Truck models? +
You can compare the Komatsu HD785-7 Rock Truck side by side with any other model using the Heavy Equipment Hub compare tool. Key comparison points include engine power, operating weight, digging depth, hydraulic flow, and overall dimensions.